Home / 268,278.40-402,417.60-81,299.20

Finding the Fourth Proportional to 268,278.40, 402,417.60 and 81,299.20

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Solution

The fourth proportional to 268,278.40, 402,417.60 and 81,299.20 is: 121,948.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    268,278.40 : 402,417.60 = 81,299.20 : x
  2. Step 2: Convert to fraction form
    268,278.40/402,417.60 = 81,299.20/x
  3. Step 3: Cross multiply
    268,278.40x = 402,417.60 × 81,299.20
  4. Step 4: Simplify right side
    268,278.40x = 32,716,228,945.92
  5. Step 5: Solve for x
    x = 32,716,228,945.92/268,278.40
  6. Step 6: Final answer
    x = 121,948.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.